Function std::intrinsics::coverage_counter_subtract

#[lang = "coverage_counter_subtract"]pub unsafe extern "rust-intrinsic" fn coverage_counter_subtract(
    index: u32, 
    left_index: u32, 
    right_index: u32, 
    file_name: &'static str, 
    start_line: u32, 
    start_col: u32, 
    end_line: u32, 
    end_col: u32
)

🔬 This is a nightly-only experimental API. (core_intrinsics)

intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library

This marker identifies a code region and two other counters or counter expressions whose difference is the number of times the code region was executed. (See coverage_counter_add for more information.)